Figure 9: Separated Combustion Heater - Vertical And Horizontal Vent Termination; Figure 10: Concentric Vent Box - Addison UHA 150 Installation, Operation & Service Manual

UHA S U H
TANDARD NIT EATER

Figure 9: Separated Combustion Heater - Vertical and Horizontal Vent Termination

Minimum from air inlet to vent
Model **Vent Diameter
UHA[X]S 150 - 400
Model *Air Intake Diameter
UHA[X]S 150 - 250
UHA[X]S 300 - 400

Figure 10: Concentric Vent Box

Seal joint between single wall
and Type B vent with silicone sealant.
Combustion Air
to Heater
Exhaust
from Heater
16 of 49
I O
NSTALLATION PERATION AND
12" (31 cm)
termination.
Air Intake*
Vertical
Option
90°
Bend
Part Number
4" (10 cm) 90502102
Part Number
4" (10 cm) 90502102
5" (13 cm) 90502105
4" (10 cm) or
5" (13 cm)
Use 3 sheetmetal
screws equally
spaced around joint.
4" (10 cm) Single
Wall Vent Pipe
(By Others)
S M
ERVICE ANUAL
12" (31 cm)
Minimum from roof to vent
termination.
Vent**
Horizontal
Option
Air Intake
Vent**
Listed Thimble through
Combustible Wall
Use 3 sheetmetal
screws equally
spaced around collar.
12" (31 cm)
Minimum from air inlet to vent
termination.
Air Intake
Termination
Vent
Termination
12" (31 cm)
Minimum from wall
to vent termination.
NOTE: Vent supports not shown
6" (15 cm) or 8" (20 cm)
Single Wall Inlet Air Pipe
(By Others)
Concentric
Vent Box
Toward
Outside